Astronomical Pictures
AstroWeb
CADC: Canadian Astronomy Data Center
CDS: Centre de Données astronomiques de Strasbourg
Geneva Observatory Database
Globular and Open Cluster Databeses
IAU Circulars
IBVS: Information Bulletin on Variable Stars
IPAC: Infrared Processing and Analysis Center
Minor Planet Electronic Circulars
OPAL
Planetary Data
Potekhin Electron Conductivity of Stellar Plasmas
Sky View Virtual Observatory
SIMBAD
STScI Archive
Stellar Atmosphere Models
Stellar Evolutionary Tracks and Isochrones